guloader | 8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2024 06:08

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General

Target

Readouts.bat.exe
Size

970KB
MD5

492707a5e753b9c5faa6a9829e065775
SHA1

7a48c9ae447780551a9714b5cccde57f16094e01
SHA256

8a0a6bad685a0e4517d2f1e8f70fff1195c78470e467255dfeb1c3f7ec922514
SHA512

e7ab1808dadb1a1da12ac66e6f9c631a5ca58b4575bebfba21aa6b6907153bd8e4af2904e3039a77f0a4f9bc94cd408f108c05181878270c5446862b01ffa707
SSDEEP

24576:oewAoAZIk1OYV8pC0SUGKSGnx7eq0xQUsHVSm:CAFLErOUGKSe5eq0xQhHs

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 6 IoCs

pid	Process
2252	Readouts.bat.exe
2252	Readouts.bat.exe
2252	Readouts.bat.exe
2252	Readouts.bat.exe
2252	Readouts.bat.exe
2252	Readouts.bat.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2252	Readouts.bat.exe
1032	Readouts.bat.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2252 set thread context of 1032	2252	Readouts.bat.exe	91

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\mysterist.ini	Readouts.bat.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Readouts.bat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Readouts.bat.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2252	Readouts.bat.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 1032	2252	Readouts.bat.exe	91
PID 2252 wrote to memory of 1032	2252	Readouts.bat.exe	91
PID 2252 wrote to memory of 1032	2252	Readouts.bat.exe	91
PID 2252 wrote to memory of 1032	2252	Readouts.bat.exe	91
PID 2252 wrote to memory of 1032	2252	Readouts.bat.exe	91

C:\Users\Admin\AppData\Local\Temp\Readouts.bat.exe
"C:\Users\Admin\AppData\Local\Temp\Readouts.bat.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Users\Admin\AppData\Local\Temp\Readouts.bat.exe
  "C:\Users\Admin\AppData\Local\Temp\Readouts.bat.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsdA8B4.tmp\LangDLL.dll

Filesize
5KB

MD5
3dd80dff583544514eeb3a5ed851a519

SHA1
56f7324d9d4230c96d1963e7b3e02b05a6cf5c24

SHA256
86cff5eaca76c49f924cb123d242fdcfd45ab99c4b638d3b8f4a8cfb1970ab5b

SHA512
955f4df195b5d134449904e9020f80125cfb64d70d9482ff583451f3fcb10d15577ceac4180f71a96452d8478f6365160ab15731f9a79a494383087c9310fd1d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsdA8B4.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/1032-34-0x0000000077AB8000-0x0000000077AB9000-memory.dmp

Filesize
4KB

Download
memory/1032-38-0x0000000077A31000-0x0000000077B51000-memory.dmp

Filesize
1.1MB

Download
memory/1032-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1032-36-0x0000000001660000-0x000000000284D000-memory.dmp

Filesize
17.9MB

Download
memory/1032-35-0x0000000077AD5000-0x0000000077AD6000-memory.dmp

Filesize
4KB

Download
memory/1032-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1032-33-0x0000000001660000-0x000000000284D000-memory.dmp

Filesize
17.9MB

Download
memory/2252-28-0x0000000077A31000-0x0000000077B51000-memory.dmp

Filesize
1.1MB

Download
memory/2252-32-0x0000000004A50000-0x0000000005C3D000-memory.dmp

Filesize
17.9MB

Download
memory/2252-30-0x0000000004A50000-0x0000000005C3D000-memory.dmp

Filesize
17.9MB

Download
memory/2252-29-0x0000000074894000-0x0000000074895000-memory.dmp

Filesize
4KB

Download
memory/2252-27-0x0000000004A50000-0x0000000005C3D000-memory.dmp

Filesize
17.9MB

Download